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在JSP開發中使用jdom解析臨時存放數據的XML文件
編輯:XML詳解     

sp;   在我工作過程中,遇到了對臨時存儲產品信息的XML文件進行操作的問題.其中就有對XML文件的解析操作,考慮到用DOM或SAX比較麻煩,於是我選擇了用jdom進行解析.因為我的XML文件結構比較簡單,僅有兩層,而且沒有復雜的屬性,所以沒有用到裡面太多的方法,只希望能夠拋磚引玉,給初學者一點幫助.

    下面我就把大概的實現過程說一說.

    一.實現解析XML文件的JavaBean(XMLBean):

    我把對存放產品信息的xml文檔的全部操作都寫在了XMLBean()裡面,包括添加,修改,刪除一條記錄,查看相關記錄等操作.具體實現的代碼如下:

package XML;
import Java.io.*;
import Java.util.*;
import org.jdom.*;
import org.jdom.output.*;
import org.jdom.input.*;
import Javax.servlet.*;
import Javax.servlet.http.*;
/**
 * <p>Title:XMLBean</p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2005</p>
 * @author lihs
 * @version 1.0
**/
/*
**
**通過往XML文件裡面添加,刪除,修改記錄。從而實現對生產部門提交產品信息的處理。
*/
public class XMLBean{
    private String ProduceID,ProduceName,ProduceClass,ProduceType,ProduceColor,Baozhiqi,ProduceNum,ProduceDep,ProduceDate;
    public String getProduceID() { return ProduceID;}
    public String getProduceName() { return ProduceName;}
    public String getProduceClass() { return ProduceClass;}
    public String getProduceType() { return ProduceType;}
    public String getProduceColor() { return ProduceColor;}
    public String getBaozhiqi() { return Baozhiqi;}
    public String getProduceNum() { return ProduceNum;}
    public String getProduceDep() { return ProduceDep;}
    public String getProduceDate() { return ProduceDate;}
    public void setProduceID(String produceid) { this.ProduceID =produceid ; }
    public void setProduceName(String producename) { this.ProduceName =producename; }
    public void setProduceClass(String produceclass) { this.ProduceClass =produceclass ; }
    public void setProduceType(String producetype) { this.ProduceType =producetype ; }
    public void setProduceColor(String producecolor) { this.ProduceColor =producecolor ; }
    public void setBaozhiqi(String baozhiqi) { this.Baozhiqi =baozhiqi ; }
    public void setProduceNum(String producenum) { this.ProduceNum =producenum ; }
    public void setProduceDep(String producedep) { this.ProduceDep =producedep ; }
    public void setProduceDate(String producedate) { this.ProduceDate =producedate ; }
    public XMLBean(){}
/**
* 通過傳入路徑讀取XML文件的內容。
*/
    public Vector LoadXML(String path)throws Exception{
        Vector XMLVector = null;
        FileInputStream fi = null;
        try{
            fi = new FileInputStream(path);
            XMLVector = new Vector();
            SAXBuilder sb = new SAXBuilder();
            Document doc = sb.build(fi);
            Element root = doc.getRootElement(); //獲取根節點
            List produces = root.getChildren(); //獲取根節點下面的所有子元素
            Element produce =null;
            XMLBean XML =null;
            for(int i=0;i<produces.size();i++){
                xml = new XMLBean();
                produce = (Element)produces.get(i ); //取得指定的孩子節點信息
                XML.setProduceID(produce.getChild("ProduceID").getText());
                XML.setProduceName(produce.getChild("ProduceName").getText());
                XML.setProduceClass(produce.getChild("ProduceClass").getText());
                XML.setProduceType(produce.getChild("ProduceType").getText());
                xml.setProduceColor(produce.getChild("ProduceColor").getText());nbsp;     XML.setBaozhiqi(produce.getChild("Baozhiqi").getText());
                XML.setProduceNum(produce.getChild("ProduceNum").getText());
                XML.setProduceDep(produce.getChild("ProduceDep").getText());
                XML.setProduceDate(produce.getChild("ProduceDate").getText());
                xmlVector.add(XML);
            }
        }
        catch(Exception e){
            System.err.println(e+"error");
        }
        finally{
            try{
                fi.close();
            }
            catch(Exception e){
                e.printStackTrace();
            }
        }
        return XMLVector;
    }
/**
* 刪除指定的元素信息
*/
    public static void DelXML(HttpServletRequest request)throws Exception{
        FileInputStream fi = null;
        FileOutputStream fo = null;
        try{
            String path=request.getParameter("path");
            int XMLid=Integer.parseInt(request.getParameter("id"));
            fi = new FileInputStream(path);
            SAXBuilder sb = new SAXBuilder();
            Document doc = sb.build(fi);
            Element root = doc.getRootElement();
            List produces = root.getChildren();
            produces.remove(XMLid);
            String indent = "";
            boolean newLines = true;
            XMLOutputter outp = new XMLOutputter(indent,newLines,"GBK");
            fo=new FileOutputStream(path);
            outp.output(doc,fo);
        }
        catch(Exception e){
            System.err.println(e+"error");
        }
        finally{
                try{
                    fi.close();
                    fo.close();
                }
                catch(Exception e){
                    e.printStackTrace();
                }
        }
    }
/**
* 往XML文件中添加一條記錄產品信息
**/
    public static void AddXML(HttpServletRequest request)throws Exception{
        FileInputStream fi = null;
        FileOutputStream fo = null;
        try{
            XMLBean bean=new XMLBean();
            String path=request.getParameter("path");
            fi = new FileInputStream(path);
            SAXBuilder sb = new SAXBuilder();
            Document doc = sb.build(fi);
            Element root = doc.getRootElement(); //
            List produces = root.getChildren(); //
            String produceid=bean.toChinese(request.getParameter("ProduceID"));
            String producename=bean.toChinese(request.getParameter("ProduceName"));
            String produceclass=bean.toChinese(request.getParameter("ProduceClass"));
            String producetype=bean.toChinese(request.getParameter("ProduceType"));
            String producecolor=bean.toChinese(request.getParameter("ProduceColor"));
            String baozhiqi=bean.toChinese(request.getParameter("Baozhiqi"));
            String producenum=bean.toChinese(request.getParameter("ProduceNum"));
            String producedep=bean.toChinese(request.getParameter("ProduceDep"));
            String producedate=bean.toChinese(request.getParameter("ProduceDate"));
            Text newtext;
            Element newproduce= new Element("Produce");
            Element newproduceid= new Element("ProduceID");
            newproduceid.setText(produceid);
            newproduce.addContent(newproduceid);
            //
            Element newproducename= new Element("ProduceName");
            newproducename.setText(producename);
            newproduce.addContent(newproducename);
            //
            Element newproduceclass= new Element("ProduceClass");
            newproduceclass.setText(produceclass);
            newproduce.addContent(newproduceclass);
            //
            Element newproducetype= new Element("ProduceType");
            newproducetype.setText(producetype);
            newproduce.addContent(newproducetype);
            //
            Element newproducecolor= new Element("ProduceColor");
            newproducecolor.setText(producecolor);
            newproduce.addContent(newproducecolor);
            //
            Element newbaozhiqi= new Element("Baozhiqi");
            newbaozhiqi.setText(baozhiqi);
            newproduce.addContent(newbaozhiqi);
            //
            Element newproducenum= new Element("ProduceNum");
            newproducenum.setText(producenum);
            newproduce.addContent(newproducenum);
            //
  &nbsp;         Element newproducedep= new Element("ProduceDep");
            newproducedep.setText(producedep);
            newproduce.addContent(newproducedep);
            //
            Element newproducedate= new Element("ProduceDate");
            newproducedate.setText(producedate);
            newproduce.addContent(newproducedate);
            produces.add(newproduce);//
            String indent = "\n";
            boolean newLines = true;
            XMLOutputter outp = new XMLOutputter(indent,newLines,"GBK");
            fo=new FileOutputStream(path);
            outp.output(doc,fo);
        }
        catch(Exception e){
            System.err.println(e+"error");
            }
        finally{
                try{
                    fi.close();
                    fo.close();
                    }
        catch(Exception e){
                e.printStackTrace();
                }
            }
    }
/**
* 更改XML中指定的記錄的信息
*/
    public static void EditXML(HttpServletRequest request)throws Exception{
        FileInputStream fi = null;
        FileOutputStream fo = null;
        try{
            XMLBean bean=new XMLBean();
            String path=request.getParameter("path");
            int XMLid=Integer.parseInt(request.getParameter("id"));
            fi = new FileInputStream(path);
            SAXBuilder sb = new SAXBuilder();
            Document doc = sb.build(fi);
            Element root = doc.getRootElement(); //
            List produces = root.getChildren(); //
            Element produce=(Element)produces.get(XMLid);
            String produceid=bean.toChinese(request.getParameter("ProduceID"));
            String producename=bean.toChinese(request.getParameter("ProduceName"));
            String produceclass=bean.toChinese(request.getParameter("ProduceClass"));
            String producetype=bean.toChinese(request.getParameter("ProduceType"));
            String producecolor=bean.toChinese(request.getParameter("ProduceColor"));
            String baozhiqi=bean.toChinese(request.getParameter("Baozhiqi"));
            String producenum=bean.toChinese(request.getParameter("ProduceNum"));
            String producedep=bean.toChinese(request.getParameter("ProduceDep"));
sp;         Element newproducedep= new Element("ProduceDep");
            newproducedep.setText(producedep);
            newproduce.addContent(newproducedep);
            //
            Element newproducedate= new Element("ProduceDate");
            newproducedate.setText(producedate);
            newproduce.addContent(newproducedate);
            produces.add(newproduce);//
            String indent = "\n";
            boolean newLines = true;
            XMLOutputter outp = new XMLOutputter(indent,newLines,"GBK");
            fo=new FileOutputStream(path);
            outp.output(doc,fo);
        }
        catch(Exception e){
            System.err.println(e+"error");
            }
        finally{
                try{
                    fi.close();
                    fo.close();
                    }
        catch(Exception e){
                e.printStackTrace();
                }
            }
    }
/**
* 更改XML中指定的記錄的信息
*/
    public static void EditXML(HttpServletRequest request)throws Exception{
        FileInputStream fi = null;
        FileOutputStream fo = null;
        try{
            XMLBean bean=new XMLBean();
            String path=request.getParameter("path");
            int XMLid=Integer.parseInt(request.getParameter("id"));
            fi = new FileInputStream(path);
            SAXBuilder sb = new SAXBuilder();
            Document doc = sb.build(fi);
            Element root = doc.getRootElement(); //
            List produces = root.getChildren(); //
            Element produce=(Element)produces.get(XMLid);
            String produceid=bean.toChinese(request.getParameter("ProduceID"));
            String producename=bean.toChinese(request.getParameter("ProduceName"));
            String produceclass=bean.toChinese(request.getParameter("ProduceClass"));
            String producetype=bean.toChinese(request.getParameter("ProduceType"));
            String producecolor=bean.toChinese(request.getParameter("ProduceColor"));
            String baozhiqi=bean.toChinese(request.getParameter("Baozhiqi"));
            String producenum=bean.toChinese(request.getParameter("ProduceNum"));
            String producedep=bean.toChinese(request.getParameter("ProduceDep"));
面.同時每條記錄後面都有查看,編輯,刪除的鏈接,實現的方法都寫在了上面的JavaBean裡了,在JSP頁面裡面僅需要傳給它相應參數即可.

    效果如下:

<%@ page contentType="text/Html; charset=gb2312" language="Java" errorPage="" %>
<%@ page language="java" import="Java.util.*,XML.*"%>
<Html>
<head>
<meta http-equiv="Content-Type" content="text/Html; charset=gb2312">
<title>產品管理</title>
</head>
<LINK  href="../images/TBspace.css" type=text/CSS rel=stylesheet>
<body>
<center><table width="85%" height="96" border="0" align="center">
  <tr>
    <td height="92"><img src="../image/common/produce_head.jpg" width="638" height="90"></td>
  </tr>
</table>
  <span class="style1">錄入請求中的產品信息如下</span>
<table border="1" cellspacing="0" width="90%" bordercolorlight="#000000" bordercolordark="#FFFFFF" cellpadding="0">
    <tr>
        <td width="17%"  align="center" bgcolor="#D0D0D0" >產品編號</td>
        <td width="25%"  align="center" bgcolor="#D0D0D0" >產品名稱</td>
        <td width="19%"  align="center"  bgcolor="#D0D0D0">產品類別</td>
        <td width="20%"  align="center" bgcolor="#D0D0D0">生產部門</td>
        <td  align="center" bgcolor="#D0D0D0" >查看</td>
        <td  align="center" bgcolor="#D0D0D0">編輯</td>
        <td  align="center" bgcolor="#D0D0D0">刪除</td>
    </tr>
<%
    String path =application.getRealPath("/")+"produce.XML";
    XMLBean xml=new XMLBean();
    Vector xmlall=xml.LoadXML(path);
    for(int i=0;i<XMLall.size();i++){
        xml=(XMLBean)XMLall.elementAt(i );
%>
  <tr>
    <td width="17%"  align="center" ><%=XML.getProduceID()%></td>
    <td width="25%"  align="center" ><a href="showproduce.JSP?id=<%=i%>&path=<%=path%>"><%=XML.getProduceName()%></a></td>
    <td width="19%"  align="center" ><%=XML.getProduceClass()%></td>
    <td width="20%"  align="center" ><%=XML.getProduceDep()%></td>
    <td  align="center" ><a href="showproduce.JSP?id=<%=i%>&path=<%=path%>">vIEw</a></td>
    <td  align="center" ><a href="updateproduce.JSP?ProduceID=<%=XML.getProduceID()%>&id=<%=i%>&path=<%=path%>">edit</a></td>
    <td  align="center" ><a href="okdeleteproduce.JSP?id=<%=i%>&path=<%=path%>">delete</a></td>
  </tr>
<%}%>
</table>
<input type="hidden" name="path" value="<%=path%>">
</center>
</body>
</Html>

    三.存放產品信息的XML文件produce.XML如下:

<?XML version="1.0" encoding="GBK"?>
<Produces>
 <Produce>
  <ProduceID>PW0005</ProduceID>
  <ProduceName>CD綠毒女士 50ml</ProduceName>
  <ProduceClass>女式</ProduceClass>
  <ProduceType>50ml</ProduceType>
  <ProduceColor>粉紅</ProduceColor>
  <Baozhiqi>5</Baozhiqi>
  <ProduceNum>480</ProduceNum>
  <ProduceDep>第二事業部</ProduceDep>
  <ProduceDate>2005-05-26</ProduceDate>
 </Produce>
 <Produce>....</Produce>
</Produces>

  以上是本人的一點小總結,因為水平有限,不足還請大家諒解,謝謝

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